By Tiernan Ray

Here are some things going on this morning in your world of tech:

Shares of wireless patent holding firm InterDigital (IDCC) are up $1.39, or 4.8%, at $30.11, and were briefly halted in pre-market trading, after the company this morning said it agreed to enter binding arbitration with Chinese telecom firm Huawei, after last week’s unfavorable ruling by the International Trade Commission denying infringement claims by InterDigital against Huawei, Nokia (NOK), and another Chinese vendor, ZTE (0763HK).

With fanfare yesterday about Apple (AAPL) signing deal, it seems not unreasonable some of the Street’s attention would turn to China Mobile’s (CHL) side of the deal. China Mobile’s American Depository Receipts are up 3 cents at $52.50 this morning.

Wedge Partners’s Jun Zhang and Brian Blair this morning write “We believe China Mobile will initially procure 10-12 mln iPhone 5s/5c models and will also launch the iPhone 6 later in 2014. We believe China Mobile’s subsidy rate will be slightly higher than that of China Unicom (CHU), but lower than China Telecom (CHA) […] We think China Mobile’s total handset subsidies in 2014 will be 32 bln RMB, up from 27 bln RMB in 2013. We expect total handset procurement to increase from 120 mln units in 2013 to 170 mln units in 2014.”

Citigroup’s Asia tech team, which rates China Mobile shares a Buy, with a $63.20 target price, write “We estimate CM will have less than $1.65 billion handset subsidies for iPhone in FY14 with close to 10m unit iPhone sales, and over 50% through 3rd channels without subsidies.”

And Jefferies & Co.’s Cynthia Meng, who has a Hold rating on the shares, trimmed her price target today by a dollar, to $57, writing “We are currently modeling 12mn units of iPhone 5s and 5c sold through China Mobile channels, and handset subsidies of RMB42.4bn (including iPhone related subsidies) in FY14. This is 6.8% of FY14 total service revenue, up from RMB27bn in FY13.”

Speaking of Apple, a story this morning by Aaron Lee and Joseph Tsai of DigiTimes claims the company is working on a 12.9-inch version of the iPad, citing multiple unnamed sources “from the upstream supply chain.”

Apple shares today are backing off of yesterday’s nearly 4% gain, down $3.21, or 0.6%, at $566.88.

Canaccord Genuity’s Bobby Burleson today reiterates a Buy rating on shares of 3-D printer technology maker 3D Systems (DDD), and raises his price target to $95 from $85, writing that the Consumer Electronics Show, which kicks off the second week of January, will bring consumer-related printing announcements from the company that will help expand the stock’s P/E multiple.

“New products represent additional channel expansion opportunities, and channel expansion has been a big contributor to the consumer strength.,” he writes.

“On a separate note, we believe DDD’s announced acquisition of Xerox’s printhead R&D team propels the company’s ink jet technology roadmap ahead by several years and when combined with Z-Corp could be instrumental in innovations in full color and true black, as well as critical to addressing future manufacturing needs of the Motorola joint development effort for project Ara. Our estimates remain unchanged.”

3D Systems stock is down $4.31, or almost 5%, at $86.63.

Wunderlich Secruities’s Blake Harper this morning reiterates a Sell rating on shares of Twitter (TWTR), and a $34 price target, noting that a 148% climb so far in the stock from its IPO price means “While the company is growing revenues faster than its fastest growing peers and we do recognize the potential for the company to capture larger portions of the mobile and TV advertising market, it appears valuation metrics are irrelevant and that investors are betting aggressively on Twitter being the next great media-technology platform.”

With the float only 11% of shares outstanding, it is “creating a significant leveraging effect on the market value of the company. “There is $5.2 billion of public investor capital supporting the $46 billion market cap,” he writes.

About Tech Trader Daily

Tech Trader Daily is a blog on technology investing written by Barron’s veteran Tiernan Ray. The blog provides news, analysis and original reporting on events important to investors in software, hardware, the Internet, telecommunications and related fields. Comments and tips can be sent to: techtraderdaily@barrons.com.